An injection device having a distal and a proximal end comprising； a housing (1)； a needle protecting sleeve (2) longitudinally movable relative to the housing (1)； a container holder (20) longitudinally movable relative to the housing (1) towards the proximal end of the device from a non-delivery position into a delivery position； a needle protecting sleeve spring (5) operably coupled between the needle protecting sleeve (2) and the container holder (20) such that the needle protecting sleeve (2) can be longitudinally moved towards the distal end of the device from an initial position into an activating position and towards the proximal end of the device from the activating position into an end position. The invention is characterized in that the needle protecting sleeve spring (5) is strained by a first amount when the a needle protecting sleeve (2) moves from its initial position to the activating position, and by a second amount when the container holder (20) moves from its non-delivery position to the delivery position.一種具有遠側端及近側端之注射裝置，包括：外殼(1)；針保護套筒(2)，可相對該外殼(1)縱向地運動；容器夾具(20)，可由非輸送位置相對該外殼(1)縱向地運動朝該裝置之近側端進入輸送位置；針保護套筒彈簧(5)，可操作地耦接於該針保護套筒(2)及該容器夾具(20)之間，使得該針保護套筒(2)可由最初位置被縱向地運動朝該裝置之遠側端進入啟動位置，及由該啟動位置朝該裝置之近側端進入末端位置。本發明之特徵為當針保護套筒(2)由其最初位置運動至該啟動位置時，該針保護套筒彈簧(5)變形達第一數量，且當該容器夾具(20)由其非輸送位置運動至該輸送位置時，該針保護套筒彈簧(5)變形達第二數量。
